IPv6 Addresses
citaf.org. 900 IN AAAA 2001:718:FF05:202:0:0:0:243
Name Servers
citaf.org. 899 IN NS decsys.vsb.cz. citaf.org. 899 IN NS nsa.ces.net. citaf.org. 899 IN NS nsa.cesnet.cz.
Mail Servers
citaf.org. 900 IN MX 10 ag2.cesnet.cz. citaf.org. 900 IN MX 10 ag1.cesnet.cz.
SOA Details
citaf.org. 900 IN SOA nsa.cesnet.cz. hostmaster.cesnet.cz. 2025061700 28800 7200 1814400 900
Certificate Authority Authorization
No CAA records were returned at this registrable domain name. With no CAA policy, any public certificate authority (CA) may issue TLS certificates for names under this zone unless a parent publishes CAA; add issue / issuewild / iodef records to restrict issuance.
DMARC
Organizational policy (p): how receivers treat mail that fails aligned DMARC checks — none (monitor only), quarantine (often junk), or reject (block).
pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).
100Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.
Forensic (per-failure) reports. Often omitted for privacy or volume.
citaf.org. 900 IN DMARC v=DMARC1; p=reject
DKIM
No DKIM TXT with `v=DKIM1` was returned for the selector names we probe automatically.
SPF (Sender Policy Framework)
| Qualifier | Mechanism | Target / value | Valid | Details |
|---|---|---|---|---|
| - Fail | all |
—
|
|
citaf.org. 900 IN TXT "v=spf1 -all"
MTA-STS
This hostname does not publish an MTA-STS policy (no v=STSv1 TXT at _mta-sts.<name> and/or no policy at https://mta-sts.<name>/.well-known/mta-sts.txt).